Locomotive



- j ST TES- 3 BO F C I seem L. for mmsmnw :rn'nsisr; aim cnnis'rornjnnni or mammal-1A1), msacnusn'r'rs, assrcnons-moc-smremnmmq CQMlAW-Ipr amen! crrr; mm mnsnY, a conrona'rlonon DELAWARE 1 for. a

The primary objectoof the invention isto y p H I p v '1s showman-outline only in ordento avoid comg 'pli'cation in'the drawing. The I tender is; indicated at-B, "also only inioutlinesgi 5 provide meansfor venting any air which may be present in the feed water pump or its intake or dischargepipesi Such air forms in pockets, at times,

that the suction action of the pump is im-;

paired. Sometimesthe, entire feed water'sys .tem

that-the ump is rendered entirely inefiectives i This di culty is encountered to a certain exf tent with all typesof 'feed water pumps but" particularly with the centrifugaltype as the umping elements of a centrifugal pump equently require priming fluid for starte in iackof suction also results when the boiler check valve develops leakage. This leak! age at times, is suflicientto fill the feed sys tem with steam and drive the water all the ,4. l a Y nection 13 s prov1ded with a valveli of any waylback to the tender. We also aim to overcome difiiculties resulting from such leaki age. l Ventin valves have sometimes been ap} feed watersystems but thesehavef plied to always required manual. operation. Accord ing to the present invention we provideja venting system which requires no attention and which is entirely automatic in operationi How the foregoingtogether with other objects and advantages are obtained will be; description cone sidered in connection with the accompanying 15 clear from the to lowing drawing which illustrates a preferred embodiment of the invention and in which Fig. 1 is a somewhat diagrammatic frag mentary side view of an engine and tender with a pump of the centrifugaltygqwith its and t e intake and delivery pipes, venting sistem of the present invention applied t auto; and

This invention relates to locomotives, par-1 LL ticularly to boiler feed mechanisms thereparticularly when the locomotive is standing idle, with the resultj becomes filled with air with the result p ofthe pump; through thestramer chamber 6 y 7 I A'motor 7? thfluidipressuregthrough the Fig. 2 is a view on an enlarged scale and through in vertical section" of the 1 eferri gnow' to" the the refer ence letter A} indicates thelo'comotive which j Lald'acent the pump.

=.'1h .pump3 may "be :mounted on the locomotive in 1 any suitableilocation and manner; Thepipecommunicatesiat one'endIwith-the 5 tender tank, throughathel flexible connection and at its other fend with the suctionside which is -sh owvn in 'detailIinFig; 2. supplied wi I pipe' 8fserves to'drivethe pumpJB Water is high w'water "level in the tender.)v .jThe con- 'suitable type-which is adapted to close .when j;thepump 1's in operation, i. e., w-hen there is water pressure in pipe-:13}; "This valvemay 7 take the' form eta check valve,such,fore ex fl ampleg as an 'inver-ted ball check valveyanfl is "preferably' located just. below the, vent 12 above the high water level in the; tender; If desired'y'a pipe 10' maybe. rovidejd to" vent air fromthesuctionsidero theiagunlilp l This pipe may communicate wi vent 12 at-one-endand with the hamberfi at the 1 tender side .:of ,itheiscreen ;'11 in; said chamben lsee Fig.12.i)';1.1: :1 W

A cap 15jmaybe provided ,onkthechalhber 61 for purposes of removingdirtiland cleaning or r'enewingthe screen; 11. y, l

jWhe'n th pump isistandingidletheivalve 14 remains openand anya ain or steamiwhich inayrhaveworked its vway-into the feedwatet' um fmg" system -passe's-,- upwardly 'e valve 14 and out of the vent 12. a 

